Swaffham-based STG Aerospace has seen its order books boosted by a contract extension with Southwest Airlines.
The deal will see it retrofitting its SafTglo lighting system on the Dallas-based firm's fleet of Boeing 737-300s.
Installation will begin in 2013 as part the airline's new Evolve interior.
The latest announcement comes on a tailwind for the Norfolk company, which recently secured a 10-year deal with Boeing to supply its innovative in-flight floor path marking systems.
The multi-million-pound contract is set to help the company reach a turnover target of £10m, while the 10-year contract extension is also expected to help boost staff numbers.
STG Aerospace employs 20 staff in Swaffham, while about 25pc of its manufacturing spend is with local companies in Norfolk.
Nigel Duncan, who became the firm's new chief executive earlier this year, taking over from Richard Moore, said: 'We're delighted that Southwest Airlines has chosen SafTglo for some of its Classic 737 fleet.
'We look forward to continuing to work with Southwest Airlines.'
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